“No clue either to Essarès’ murderer?”
“No, none.”
“Are you quite sure?”
“Why should I tell a lie?”
“Suppose it was yourself? Or one of your friends?”
“We thought that you would suspect us. Fortunately, we happen to have an alibi.”
“Easy to prove?”
“Impossible to upset.”
“We’ll look into it. So you have nothing more to reveal?”
“No. But I have an idea . . . or rather a question which you will answer or not, as you please. Who betrayed us? Your reply may throw some useful light, for one person only knew of our weekly meetings here from four to five o’clock, one person only, Essarès Bey; and he himself often came here to confer with us. Essarès is dead. Then who gave us away?”